Buckle Effect Factors Analysis and Stability Bearing Capacity Check of Rib Ring Stiffened Roof

Selecting 36 the basic models, the arc length method is used to the nonlinear buckling analysis of the structure with the first order buckling mode as the initial form. The influence of boundary condition, initial defect, rise span ratio and section size on the structure buckling performance is investigated. Through the quantitative analysis of the relationship between the radius of curvature, the equivalent membrane thickness, the equivalent bending thickness and the critical buckling load, fitting the buckling critical formula by using the least square method, analyzing and selecting the safety factor, the calculation formula of characteristic value of stability allowable bearing capacity is obtained.